Which of the following changes is not a physical change?
Sublimation
Boiling of water
Glowing of filament in bulb
Combustion
A
Glowing of filament in bulb
B
Boiling of water
C
Sublimation
D
Combustion
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Solution
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Combustion represents a chemical reaction whereby the carbon compounds are converted into different chemicals like carbon dioxide and water vapor in presence of oxygen. So this is a chemical change.
The other options are physical changes as there is no change in the chemical composition of the substances in these processes.
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